A mid-plane is disclosed. The mid-plane includes a first printed circuit
board having a plurality of plated vias adapted to receive tails attached
to a first connector and having a plurality of unplated clearance holes
adapted to receive tails attached to a second connector. The second
printed circuit board has a plurality of plated vias adapted to receive
tails attached to the second connector and has a plurality of unplated
clearance adapted to receive tails attached to the first connector.